Display device and manufacturing method thereof

ABSTRACT

In a display device having high reliability, even if being a narrow framing type, and a method for manufacturing thereof, having a display panel, being made up with a first substrate 101 and a second substrate 201, which are adhered with using a seal 301, a main SOC 302 is disposed like a wall, on a peripheral end portion of the first substrate 101 and the second substrate 201, and the seal 301 is disposed inwardly of the main SOC 302. Also, in a method for manufacturing thereof, the main SOC 302 is formed in a region including a cutting plane between the display panel regions neighboring with, and on the cutting plane is made the cutting thereof.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.17/223,100, filed on Apr. 6, 2021, which, in turn, is a continuation ofU.S. patent application Ser. No. 16/893,620 (now U.S. Pat. No.10,996,526) filed on Jun. 5, 2020, which, in turn, is a continuation ofU.S. patent application Ser. No. 16/679,407 (now U.S. Pat. No.10,712,622) filed on Nov. 11, 2019, which, in turn, is a continuation ofU.S. patent application Ser. No. 16/197,449 (now U.S. Pat. No.10,503,025) filed on Nov. 21, 2018, which, in turn, is a continuation ofU.S. patent application Ser. No. 15/988,107 (now U.S. Pat. No.10,162,221) filed on May 24, 2018, which, in turn, is a continuation ofU.S. patent application Ser. No. 15/189,106 (now U.S. Pat. No.10,007,152) filed on Jun. 22, 2016, which, in turn, is a continuation ofU.S. patent application Ser. No. 14/791,122 (now U.S. Pat. No.9,395,585) filed on Jul. 2, 2015, which, in turn, is a continuation ofU.S. patent application Ser. No. 14/034,827 (now U.S. Pat. No.9,104,073) filed on Sep. 24, 2013. Further, this application claimspriority from Japanese Patent Application JP 2012-219420 filed on Oct.1, 2012, the entire contents of which are hereby incorporated byreference into this application.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a display device, built up by adhering2 pieces of substrates with using a seal, and a method, as well, formanufacturing the same.

Description of the Related Art

A display devices, such as, a liquid crystal display device, forexample, is spreading application thereof, widely, in various technicalfields, because of a flat configuration, a light-weight and an electricpower saving thereof. Onto a portable phone (e.g., a mobile phone)and/or a DSC (Digital Still Camera), etc., for example, are applied thesmall-sized liquid crystal display devices, widely. The display devices,being built up by adhering 2 pieces of substrates with using a sealmember therebetween, in particular, relating to the liquid crystaldisplay device, are described in the following Japanese Patent Laid-OpenNo. 2007-304452; and Japanese Patent Laid-Open No. 2007-148449.

In the Japanese Patent Laid-Open No. 2007-304452 is disclosed a liquidcrystal display device, spreading an area of a seal member, which is incontact with a groundwork, by forming a structure provided for excludingan alignment film in an area where the seal member contacts with thealignment film, while forming an end portion of the alignment filmwithin an inside of the seal member, in a terminal connector portionwhere other substrate extends directing outside from one substrate, andalso forming the alignment film in an outside of the seal member, on aside where the end portions those 2 pieces of the substrates are alignedwith, for the purpose of maintaining the bonding strength of the sealmember, in the liquid crystal display device, being built up with 2pieces of substrates adhered by the seal member on the periphery of thesubstrates.

Also, in the Japanese Patent Laid-Open No. 2007-148449 is disclosed aliquid crystal display device, which is manufactured by disposing andbaking the seal member, provisionally, on a transparent substrate madeof a plastic, and forming a column-like spacer(s) within the seal on atransparent substrate of the plastic, wherein the transparent substratedisposing the seal member and the transparent substrate forming thecolumn-like spacer(s) within the seal are put on each other in such amanner that the column-like spacer(s) within the seal is/are buried intothe seal members, and are baked under heating/suppression, to be sealedup on the seal portion thereof, for providing the liquid crystal displaydevice improved in the reliability with respect to sealing thereof, inparticular, in a device necessitating a low-temperature manufacturingprocess, being equal to or lower than 160° C., such as, a STN liquidcrystal display device applying a plastic substrate therein, etc.

SUMMARY OF THE INVENTION

Within the display device, such as, the liquid crystal display device,etc., so-called a narrow framing is advanced, i.e., narrowing the frameportion, starting from a panel end portion up to a pixel region (i.e.,an effective display region), for the purpose of widening a displayscreen with respect to an outer configuration thereof, in particular, inthe liquid crystal display panel.

FIG. 6A shows a plane view of an outlook of the conventional liquidcrystal display panel (before being cut out). As is shown in thisfigure, an alignment film 310 is formed in a region larger than that ofan effective display region 410. Also, FIG. 6B is a cross-sectional viewof A-B portion of the liquid crystal panel shown in FIG. 6A. A seal 301is formed between a color filter (CF) side substrate 201, on which ablack matrix film (BM) 202 and an over coating film (OC), etc., and aTFT side substrate (made of glass) 101, on which are formed a siliconnitride film 102 for forming a gate insulation film, an inorganicpassivation film (PAS) 103, an upper layer passivation film (UPS) 104 oran organic passivation film (FPS) 104, a gate wiring (GAL) 110, a drainwiring (DCR) 111, etc. Also, the alignment film 310 is formed byprinting, on the CF side substrate 201 and the TFT side substrate. Areference numeral 305 denotes a SOC (Space on color filter), which isdisposed within the effective display region for the purpose of defininga gap distance between those substrates, while a reference numeral 306denotes a sub SOC within the effective display region. Also, the samereference numerals denote the same constituent elements, respectively.

Explanation will be given about a manufacturing method by referring toFIG. 8 . On the CF side substrate, after forming the over coating film(OC), etc., thereon, the alignment film 310 is printed for each liquidcrystal display panel, and a surface of the alignment film is rubbed ina certain direction (i.e., rubbing). Next, a seal 301 is applied on foreach liquid crystal display panel. The seal 301 may be applied on theTFT side substrate. On the TFT side substrate, after forming UPS or FPSthereon, the alignment film is printed for each liquid crystal displaypanel, and the rubbing is made thereon. Thereafter, the CF and the TFTside substrates, on each of which is applied the seal, are piled upwith, so that the surfaces, being formed the alignment films thereon,are opposite with each other, and they are bonded.

If the narrow framing is advanced, it is very difficult to keep aneffective seal width and a tolerance of size of printing the alignmentfilm. Thus, conventionally, the printing position of the alignment filmdoes not overlap the region where the seal 301 is formed, or a verylittle if it overlaps, including an error of the printing position ofthe alignment film; thus, it is possible to maintain the effective sealregion (i.e., the region shown by arrows in both directions within theseal 301). However, narrowing the distance between the end portion(i.e., the cutting plane) and an end portion of the effective displayregion 410 brings a permissible error (i.e., a size tolerance) in theprinting position of the alignment film 310 to be restrictive.

The inventors made studies upon the permissible error of the printingposition, and reach to a solution of the problem of the permissibleerror, by forming the alignment films, each of which is printed for eachliquid crystal display panel, conventionally, but covering over pluralnumbers of the liquid crystal panels. Then, the inventors manufactured aliquid crystal display device having such unique structure as mentionedabove. FIG. 7A shows a plane view of an outlook of the liquid crystaldisplay panel (before cutting), which the inventors studied. As is shownin this figure, the alignment film 310 is formed covering over everyliquid crystal display panel. Also, FIG. 7B is a cross-sectional view ofA-B portion of the liquid crystal display panel shown in FIG. 7A.Forming the alignment film 310 covering over the every liquid crystaldisplay panel (i.e., a solid pattern) does not brings about afluctuation within the region where the alignment film 310 and the seal301 are overlapping on each other. In those Japanese Patent Laid-OpenNo. 2007-304452 and Japanese Patent Laid-Open No. 2007-148449 mentionedabove, it is not apparent if the alignment film is formed or not,covering over the plural numbers of the liquid crystal display panels.

However, as a result of such structure as mentioned above, so-called ablack unevenness or spot is generated, and then it is apparent that thereliability thereof is deteriorated.

An object of the present invention lies to provide a display devicehaving high reliability even if being narrowed with the frame thereof,and a method for manufacturing the same.

According to the present invention, as an embodiment for accomplishingthe object mentioned above, there is provided a display device, having adisplay panel, being constructed by adhering a first substrate and asecond substrate with using a seal, wherein a main SOC for use ofadjusting a gap distance is disposed like a wall, on a peripheral endportion of the first and second substrates, and the seal is disposedinwardly of the main SOC.

Also, according to the present invention, there is also provided amethod for manufacturing a display device, comprising the followingsteps of:

a step for preparing a first substrate having plural numbers of displaypanel regions, each having an effective display region;

a step for forming a first organic film covering over the plural numbersof display panel regions on the first substrate;

a step for preparing a second substrate, having plural numbers ofdisplay panel regions, each having an effective display region, andbeing formed with a main SCO for use of adjusting a gap distance in aregion including a cutting plane of the display panel region;

a step for forming a second organic film covering over the pluralnumbers of display panel regions on the second substrate;

a step for applying a seal on a region of the second substrate,including a region where the main SOC is formed and/or a regionincluding a cutting plane of the display panel region of the firstsubstrate;

a step for laminating the first substrate and the second substrate, sothat the first organic film of the first substrate faces to the secondorganic film of the second substrate, and thereby adhering those to eachother by the seal; and

a step for cutting out the display panel region on the cutting plane, sothat the main SOC is separated.

According to the present invention, it is possible to provide a displaydevice having high reliability even if being narrowed with the framethereof, and a method for manufacturing the same.

BRIEF DESCRIPTION OF THE DRAWINGS

Those and other objects, features and advantages of the presentinvention will become more readily apparent from the following detaileddescription when taken in conjunction with the accompanying drawingswherein:

FIG. 1 is a cross-sectional view of a principle portion (i.e., a sealportion) of a liquid crystal display device, according to a firstembodiment of the present invention;

FIG. 2A is an entire plane view of the outlook of the liquid crystaldisplay device, according to the first embodiment of the presentinvention;

FIG. 2B is an entire plane view of the outlook thereof, for explainingthe positions where a main SOC and a seal are disposed, within theliquid crystal display device, according to the first embodiment of thepresent invention;

FIG. 3 is an outlook plane view (before cutting) for explaining a regionwhere an alignment film is formed, within the liquid crystal displaydevice, according to the first embodiment of the present invention;

FIG. 4 is an outlook plane view (before cutting) for explaining a regionwhere an alignment film is formed, within other liquid crystal displaydevice, according to the first embodiment of the present invention;

FIG. 5 is a cross-sectional view of a principle portion (i.e., a sealportion) of a liquid crystal display device, according to a secondembodiment of the present invention;

FIG. 6A is an outlook plane view of the conventional liquid crystaldisplay panel (before cutting);

FIG. 6B is an outlook cross-sectional view of A-B portion of the liquidcrystal display panel shown in FIG. 6A;

FIG. 7A is an outlook plane view of the liquid crystal display panel(before cutting), in relation with the studies made by the inventors andso on;

FIG. 7B is an outlook cross-sectional view of A-B portion of the liquidcrystal display panel shown in FIG. 7A;

FIG. 7C is an outlook cross-sectional view, for explaining deteriorationof reliability of the liquid crystal display panel (after cutting), inrelation with the studies made by the inventors and so on; and

FIG. 8 is a flowchart of an outlook of steps, for explaining a methodfor manufacturing the liquid crystal display panel.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The inventors studied the reason of generating the black spots. As aresult thereof, the followings come to be apparent on thecross-sectional view of the liquid crystal display panel shown in FIG.7C; i.e., that an adhesiveness is deteriorated between the alignmentfilm 310 and the seal 301, and that moisture intrudes therein from aboundary surface defined between the alignment film 310 and the overcoating film (OC) 203 and also a boundary surface defined between thealignment film 310 and the seal 301, and this affects ill influences tothe effective display region. Then, a main SOC (Space on color filter)is disposed like a wall in a region including the cutting plane of theliquid crystal display panel. With this, the narrow framing can beachieved, as well as, reducing/preventing the moisture from intrudingtherein, i.e., reducing/preventing of the black spots, and therefore itis possible to maintain the reliability for a long time-period. The mainSOC can be formed only on one side of the four sides of the liquidcrystal display panel, thereby obtaining an effect of reducing the blackspots, but preferably, it is formed on all of those four sides. Also, amanagement can be omitted upon the printing size of the alignment film,and therefore it is possible to reduce the manufacturing cost thereof.Further, in the Japanese Patent Laid-Open No. 2007-304452, there isformed the alignment film in an outside of the structure provided forexcluding the alignment film, then it is difficult to achieve the narrowframing, fully. Also, with the structure of the Japanese PatentLaid-Open No. 2007-148449, since the spacer within the seal iscolumn-like, therefore it is impossible to prevent the moisture fromintruding therein, fully.

Hereinafter, explanation will be given by referring to the embodiments.Although the explanation will be given on an example of liquid crystaldisplay device; the present invention is also applicable to a displaydevice, being construed by adhering 2 pieces of substrates with using aseal, and a method for manufacturing the same.

First Embodiment

A first embodiment of the present invention will be explained byreferring to FIGS. 1 to 4 . Herein, FIG. 2A is an entire plane view ofthe outlook of the liquid crystal display device according to thepresent embodiment. The present liquid crystal display device isconstructed with a display region 400 and a driver circuit region 450.FIG. 2B is an entire plane view of the outlook thereof, for explainingthe positions where a main SOC and a seal are disposed, within theliquid crystal display device, according to the first embodiment of thepresent invention. The main SOC is formed like a wall, surrounding theperiphery of a liquid crystal display panel, and the seal 301 isdisposed in a side of an effective display region (hereinafter,“inside”) of the liquid crystal display panel, with respect to the mainSOC. In the present embodiment, a sub SOC is further disposed inside themain SOC 302.

FIG. 1 is a cross-sectional view of a principle portion (i.e., a sealportion) of the liquid crystal display device according to the presentembodiment. Within the present embodiment, the main SOC 302 havingheight of 3 μm and width of 0.2 mm is formed in a region including thecutting plane of the liquid crystal display panel, facing to a CFsubstrate. With this, after cutting into each liquid crystal displaypanel, since the main SOC 302 comes to be disposed on an outermostperipheral portion between the TFT side substrate 101 and the CF sidesubstrate 201, it is possible to reduce/prevent the moisture fromintruding into the effective display region 410. The main SOC 302 can beformed in a step same to that for forming a SOC 305 within the effectivedisplay region. In that instance, though it may be made at the sameheight, but with forming the SOC 305 within the effective display regionto be lower than the height of the min SOC 302 in the height thereof, itis possible to reduce/prevent defects of periphery gaps due to bulgingof the seal. The main SOC 302 can be formed of an organic material, suchas, an acryl or an epoxy, etc., similar to the SOC 305 formed within theeffective display region.

Also, in the present embodiment, plural numbers of sub SOCs 303 for useof interruption or stop are disposed within an inside of the main SOC302. With this, even if the moisture passes through the main SOC 302,since the sub SOC 303 can elongate a route of intrusion of the moisture,then it is possible to increase the reliability thereof, further.Lowering the height of the sub SOCs 303 than that of the main SOC 302enables the seal 301, which is applied in the vicinity of the cuttingplane of the liquid crystal display panel, to flow inside, if it ispushed out by the main SOC 302 when the TFT side substrate and the CFside substrate are piled up (i.e., enabling the seal to escape from).For the seal between the main SOC 302 and the alignment film 310 on thesubstrate facing to TFT, it is preferable to be pushed out, entirely,into inside. Even if remaining a little bit thereof, it does not matter,from a practical viewpoint. Also, those sub SOCs 303 are formed in thesame step and of the same material to that of the main SOC 302.

Also, in the present embodiment, plural numbers of grooves are formed onthe upper layer passivation film (UPS) 104 or the organic passivationfilm (FPS) 104 of the TFT side substrate, to be the interruption orstop. Thickness of the FPS, etc., is determined to 2 μm. With this, evenin case where the moisture passes through the main SOC 302 by anychange, since the route of intrusion of the moisture can be elongated bythe grooves formed on the UPS 104 or the FPS 104, therefore it ispossible to increase the reliability, further. Moreover, with such anarrangement thereof that those sub SOCs 303 and the grooves formed onthe UPS 104 or the FPS 104 are piled up on each other, when seeing themfrom the above, vertically, since the alignment film, being pushed bythe sub SOC, tries to enter into the groove portion, then it is possibleto increase the adhesiveness between a groundwork film thereof.

Also, for the drain wiring (DCR) 111 and the gate wiring (GAL) 110, itis preferable to be disposed within inside (i.e., in a side of theeffective display region) than the sub SOC 303. Also, it is preferablethat the drain wiring (DCR) 111 and the gate wiring (GAL) 110 aredisposed, not to be piled up on the sub SOC 303, when seeing them fromthe above, vertically. The drain wiring (DCR) 111 and the gate wiring(GAL) 110 are disposed, inside, separating by about 0.2 mm from thecutting plane.

Also, the SOC is formed on the color filter substrate (the CF substrate)side in FIG. 1 , it may be formed on the TFT substrate side. Further,the color filter may be formed on the TFT substrate side. Inconsideration that the color filter is formed on the TFT substrate side,the CF substrate may be referred to as a counter substrate.

Next, an explanation will be given on a method for manufacturing thepresent liquid crystal display device, by referring to FIG. 8 . First ofall, in the same step that for forming the SOC 305 and the sub SOC 306within the effective display region is prepared the CF side substrate,which is formed with the main SOC 302 and the sub SOCs 303 thereon.Next, in the present embodiment, on the TFT side substrate and the CFside substrate are formed the alignment films 310, not for each liquidcrystal display panel, but covering over the plural numbers of theliquid crystal display panels. Thickness of the alignment film isdetermined to be 110 nm. Next, on the USP 104 or the FPS 104 of the TFTside substrate are formed the grooves through the alignment film 310.The process upon the TFT side substrate and the process upon the CF sidesubstrate may be conducted, time-sequentially or in parallel with,simultaneously, and on the contrary thereto, the process upon the TFTside substrate may be conducted first. Next, the seal 301 is applied inthe region, including the cutting plane of the CF side substratetherein. Width of the seal is determined to be 0.8 mm. The seal may bealso applied on the TFT side substrate. Also, it may be applied on boththe TFT side substrate and the CF side substrate. Following to this, theCF side substrate and the TFT side substrate are piled up, so that thesurfaces, on which the alignment films are formed, are facing to eachother, and they are adhered by the seal. When laminating each substrate,the seal 301 applied in the vicinity of the cutting plane of the liquidcrystal display panel pushes the seal, which is pushed out by the mainSOC 302, when the TFT side substrate and the CF side substrate are piledup, to flow inside, and thereby adjusts a gap distance between thesubstrates. Thereafter, it is cut into each liquid crystal displaypanel, and thereby completing the liquid crystal devices.

In relation with the disposition or arrangement before cutting out theliquid crystal display panels, as is shown in FIG. 3 , other than thecase where there is a distance between the liquid crystal display panelsneighboring with (i.e., the conventional arrangement), there can beconsidered the case where there is no distance between the liquidcrystal display panels neighboring with (i.e., a full-just arrangement),as is shown in FIG. 4 . The present embodiment can be applied, not onlyinto such arrangement as shown in FIG. 3 , but also into sucharrangement as shown in FIG. 4 .

With such arrangement of the liquid crystal display panels as shown inFIG. 4 , the liquid crystal display device, having such thecross-section structure as shown in FIG. 1 , is manufactured withapplying the manufacturing method mentioned above, and as a resultthereof, there is no generation of the black spot, and therefore, it ispossible to obtain the liquid crystal display device having highreliability thereof.

As was mentioned above, according to the present embodiment, withprovision of the main SOC in the region including the liquid crystaldisplay panel, it is possible to provide a display device having highreliability and a method for manufacturing the same, even if it is thenarrow framing type. Also, with such arrangement of the plural numbersof the sub SOCs inside the main SOC, it is possible to increase thereliability thereof, further. Also, with forming the plural numbers ofgrooves on the UPS or the FPS inside the main SOC through the alignmentfilm, it is possible to increase the reliability thereof, much more.Also, with printing the alignment film covering over the plural numbersof liquid crystal display panels, there is no necessity of themanagement of printing size of the alignment film.

Second Embodiment

An explanation will be given on a second embodiment of the presentinvention, by referring to FIG. 5 . What is described in the firstembodiment but not described in this embodiment may also be applied tothis embodiment as long as there is no particular circumstance. FIG. 5is a cross-sectional view of a principle portion (i.e., the sealportion) of the liquid crystal display device, according to the presentembodiment. The difference between the present embodiment and theembodiment 1 lies in an aspect that, comparing to the fact that theupper layer passivation film (UPS) 104 or the organic passivation film(FPS) 104 is formed on the TFT side substrate in the embodiment 1, butaccording to the present embodiment, it does not have such UPS or FPS.Accompanying this, on the TFT side substrate, the alignment film 310 isformed on the inorganic passivation film (PAS). Other structuralelements are same to those of the embodiment 1, and therefore theexplanation thereof will be omitted herein.

In the present embodiment, plural numbers of grooves are formed on theinorganic passivation film (PAS), to be the interruption or stop. Withthis, even in the case where the moisture passes through the main SOC302, since the grooves formed on the PAS 103 is able to elongate theroute of intrusion of the moisture, it is possible to increase thereliability thereof, further. Moreover, with such an arrangement thereofthat the sub SOCs 303 and the grooves formed on the PAS 103 are piled upon each other, when seeing them from the above, vertically, since thealignment film, being pushed by the sub SOC, tries to enter into thegroove portion, therefore it is possible to increase the adhesivenessbetween a groundwork film thereof.

Next, an explanation will be given on a method for manufacturing thepresent liquid crystal display device, by referring to FIG. 8 . However,neither UPS nor FPS is formed on the TFT side substrate. First of all,in the same step for forming the SOC 305 and the sub SOC 306 within theeffective display region is prepared the CF side substrate, which isformed with the main SOC 302 and the sub SOCs 303 thereon. Next, in thepresent embodiment, on the TFT side substrate and the CF side substrateare formed the alignment films 310, not for each liquid crystal displaypanel, covering over the plural numbers of the liquid crystal displaypanels. Thickness of the alignment film is determined to be 110 nm.Next, on the PAS 103 of the TFT side substrate are formed the groovesthrough the alignment film 310. The process upon the TFT side substrateand the process upon the CF side substrate may be conducted,time-sequentially or in parallel with, simultaneously, and on thecontrary thereto, the process upon the TFT side substrate may beconducted first. Next, the seal 301 is applied in the region, includingthe cutting plane of the CF side substrate therein. Width of the seal isdetermined to be 0.8 mm. Following to the above, the CF side substrateand the TFT side substrate are piled up, so that the surfaces, on whichthe alignment films are formed, are facing to each other, and they areadhered by the seal. When laminating each substrate, the seal 301applied in the vicinity of the cutting plane of the liquid crystaldisplay panel pushes the seal, which is pushed out by the main SOC 302,when the TFT side substrate and the CF side substrate are piled up, toflow inside, and thereby adjusts a gap distance between the substrates.Thereafter, it is cut into each liquid crystal display panel, andthereby completing the liquid crystal devices.

With such arrangement of the liquid crystal display panels as shown inFIG. 4 , the liquid crystal display device, having such cross-sectionstructure as shown in FIG. 5 , is manufactured with applying themanufacturing method mentioned above, and as a result thereof, there isno generation of the black spot, and therefore it is possible to obtainthe liquid crystal display device having high reliability thereof.

As was mentioned above, according to the present embodiment, withprovision of the main SOC in the region including the liquid crystaldisplay panel, it is possible to provide a display device having highreliability and a method for manufacturing the same, even if it is thenarrow framing type. Also, with the arrangement of the plural numbers ofthe sub SOCs inside the main SOC, it is possible to increase thereliability thereof, further. Also, with forming the plural numbers ofgrooves on the PAS inside the main SOC through the alignment film, it ispossible to increase the reliability therefore, much more. Also, withprinting the alignment film covering over the plural numbers of liquidcrystal display panels, there is no necessity of the management ofprinting size of the alignment film.

The present invention should not be limited to those embodimentsmentioned above, but may includes various modifications thereof. Forexample, the embodiments mentioned above are explained in the detailsthereof, for the purpose of easy understanding of the present invention,and the present invention should not be necessarily restricted to thatcomprising all of the constituent elements mentioned above. Also, a partof constituent element(s) of a certain embodiment can be replaced by theconstituent element(s) of the other embodiment, or the constituentelement(s) of the other embodiment can be added to the constituentelement (s) of the certain embodiment. Also, a part of the constituentelement (s) of each embodiment can be added/deleted/replaced by otherconstituent element(s).

What is claimed is:
 1. A display device comprising: a first substrateincluding a glass substrate, a first film, a second film, a firstwiring, and a second wiring; a second substrate opposing the firstsubstrate; and a seal in contact with the first substrate and the secondsubstrate, wherein the first film is between the glass substrate and thesecond film, the first wiring is between the glass substrate and thefirst film, the second wiring is between the first film and the secondfilm, the second film has a groove, the groove overlaps the seal, thefirst wiring does not overlap the second wiring, each of the firstwiring and the second wiring overlaps the seal, and each of the firstwiring and the second wiring does not overlap the groove.
 2. The displaydevice of claim 1, wherein the first substrate further includes a pixelregion inside of the seal, the glass substrate has a first outside edge,the groove is located between the first outside edge of the glasssubstrate and the pixel region, and the first wiring and the secondwiring are located between the groove and the pixel region.
 3. Thedisplay device of claim 2, wherein the second film is an organicpassivation film.
 4. The display device of claim 3, wherein the firstsubstrate further includes a first alignment film, and the firstalignment film overlaps the outside edge of the glass substrate.
 5. Thedisplay device of claim 3, wherein the second substrate includes aspacer, the spacer has a cutting plane, and the cutting plane of thespacer overlaps the outside edge of the glass substrate.
 6. The displaydevice of claim 5, wherein the groove of the second film is locatedbetween the spacer and the display region, the spacer does not overlapeach of the first wiring and the second wiring, the groove does notoverlap the spacer, the spacer has a side surface opposed to the cuttingplane, and the side surface of the spacer is in contact with the seal.7. The display device of claim 3, wherein the second substrate includesblack matrix, the black matrix overlaps the first wiring and the secondwiring, and the black matrix does not overlap the groove.
 8. The displaydevice of claim 5, wherein the second substrate further includes blackmatrix, the black matrix overlaps the first wiring and the secondwiring, and the black matrix does not overlap the groove.
 9. The displaydevice of claim 5, wherein the spacer does not overlap the black matrix.10. The display device of claim 3, wherein the groove does not overlapthe outside edge of the glass substrate, and the second film overlapsthe outside edge of the glass substrate.